Pump-jack cross-head.



H. G. MOCULLOCH.

PUMP JACK GROSS HEAD.

APPLICATION FILED rBB.2a,1912.

Patented Apr. 1, 1913.

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mm PLAN HARRY G. 'Ii/ICCULLOCI-I, 0F FREEPORT, ILLINOIS, ASSIGNOR TO THESTOVER MANUFAC- TUBING COMPANY, OF FREEPORT, ILLINOIS, A CORPORATION OFILLINOIS.

UMPJACK CROSS-HEAD.

Application filed February 28, 1912.

To att fav/20m it 11mg/ (formera:

le it known that I, HARRY G. McCon- Loou, a citizen of the UnitedStates, residing at Freeport, in the county of Stephenson and State ofIllinois, have invented certain new and useful Improvements in Pump-Jack Cross-Heads, of which the following is a specification.

This invention relates to cross heads in general and more particularlyto cross heads for use in connection with pump jacks and aims to providea cross head of this character which will permit the jack to be set atan angle to the pump standard and which can be quickly and easilyattached to and detached from a pump rod.

@ne of the principal objects of this invention is the provision ofimproved means for holding the cross head in operative relation with apump rod when the rod is detached therefrom for a hand or windmillpumping, said means being so constructed that the cross head may becompletely and very easily disengaged from the pump rod when desired.

For the purpose of facilitating the eX- planation of my invention I haveshown on the accompanying drawings a preferred embodiment thereof fromwhich, when considered in connection with the following description, theinvent-ion will be readily understood.

Referring to the drawings-Figure 1 is an elevation of a pump jackequipped with my invention and connected to a pump;r

Fig. 2 is an enlarged elevation of my improved cross head; Fig. 3 is aplan view thereof; Fig. 4 is a transverse sectional view on the line 4 4of Fig. 3; and Fig. 5 is a detail perspective view of my improved lockwasher. l

On the drawings, 6 designates a pump of any preferred type having theusual pump rod 7. The pump jack 8 may be of any preferred construction,the one shown on the drawings being illustrative merely, the details ofconstruction of which are immaterial so far as my present invention isconcerned. The connecting or pitman rods 9 are preferably provided withboXes 11 adapted for connection to a cross head.

The cross head, constituting the subject matter of the presentinvention, comprises a body 12 preferably of cast construction havingthe extensions or trunnions 13 adapt- Spccication of Letters Patent.

.Patented Apr. 1, itlll Serial No. 680,486.

ed to fit the boxes ll. The body is provided intermediate its ends witha socket 14 shaped to receive a swivel 15 and a lock washer' 1G, rlheswivel 15 is provided with a longitudinal slot 17 adapted to receive thepump rod 7 and the upper end of the swivel is provided with an enlargedhead or annular shoulder 18 which lits in a circumferential groove 19formed in the socket 14 to prevent longitudinal movement of the swivelrelatively to the body 12. The lock washer 16 is rotatably mounted inthe socket 14 above the swivel 15 and is provided with an opening 21 inone side thereof to permit the introduction of the pump rod laterallyinto the slot 17 of the swivel. The socket 14 is open at one side topermit the placing of the swivel 15 and the lock washer in position anda block 22, formed to provide a continuation of the socket, is securedby a bolt 23 or other preferred retaining mea-ns to the body 12 so as topartially close the mouth of the socket 14 and retain the swivel andlock washer in operative position therein.

When the cross head is to be attached to a pump rod the lock washer isturned by grasping one or both of the projections 2O which extend abovethe body 12 to bring its open side 21 into alinement with the slot 17 ofthe swivel whereupon the cross head may be swung into position so thatthe pump rod lies within the slot 17 and within the lock washer'. Thewasher is then given a half turn into the position shown in Fig. 3 ofthe drawings thereby locking the cross head in operative relation withthe pump rod. The cross head is thereby held in operative relation tothe pump rod without being connected therewith and may remain in thisposition when the pump is operated by windmill or by hand. When it isdesired to use the pump jack for pumping purposes a pin 24 may beinserted through apertures in the swivel and in the pump rod therebyrigidly connecting the pump rod and cross head together. When myimproved cross head is used it is not necessary that the pump jack beset in exact alinementwith the pump rod since the swivel 15 can beturned to present the slot 17 for the reception of the pump rod withinthe limits of the open mouth of the socket 14. The cross head my bedisconnected from the pump rod by simply withdrawing the pin 24, but thecross head will still be retained in operative relation to the rod bythe lock washer.

When it is desired to remove the jack the' lock washer is given a halfturn to bring the open side into alinement with the slot 17 whereuponthe cross head may be withdrawn from the rod.

It is believed that my invention and many of its attendant advantageswill be understood from the foregoing without further description and,while l have shown and described a practicalembodiment ofthe in vention,it will be obvious that the construction of the various mechanicaldetails may be varied within wide limits without departing from thespirit of the invention or sacrificing any of the material advantagesthereof.

I claim:

l. A pump jack cross head comprising a body, a swivel and a lock washereach open at one side to receive a pump rod, and means for detachablyconnecting the pump rod to said swivel, said lock washerbeing adapted toretainthe pump rod in sliding engagement with the swivel when saidswivel is disconnected from the rod.

2. A pumpjackcrossdiead comprising a body open at one side to receive apump rod, means for dctachably connecting the pump rod to said body, alock washer open at' one side` rotatably mounted on said body forretaining the pump rod in sliding engagement with the body when saidbody and rod have been disconnected, and means forretaining said washerin position on the body.

3. A pump jack cross head, comprising a body adapted to be connectedwith the connecting rods of a pump jack, a slotted swivel rotatablymounted thereon, and arotatable lock washer for holding a pump rod inoper-` ativel relation to said swivel.

4. A pump jack cross head comprising a body adapted to be attached tothev connecting rods of a pump jack, a swivel'provided with alongitudinal slot adapted to receive a p-ump rod rotatably mounted onsaid body,

Vand a lock washer having an open side to receive the pump rod, saidwasher being rotatably mounted on the body whereby the pump rod may belocked in operative relation to the swivel.

5. A pumpjack cross head comprising a body provided with a socket, aslotted swivel and an open-sided lock washer rotatably mounted in saidsocket, and a block for holding said swivel `and washer in' position. y6. A pump jack cross head, comprising a body provided with a socket,aswivel and an open-sided lock washer rotatably mounted in said socket,and a block for holding said swivel and `washer in position, said washerbeing provided with projections whereby the washer may beA rotated tolock a pump rod in operativeV relation to the head. L p

7. A pump jack cross head comprising a body open at onel side, al swivelsecured to the said body and openat one side and adapted to be connectedto the pump rod, a rotatable open sided lock washer, all of said membersbeing adapted to be positioned to aline the said openings for thereception of a pump rod, the rotation of the said washer serving todetachably retain the cross head and pump rod in operative relation whenvthe swivel is disconnected from the pump rod, and means for holding thesaidy washer in loperative relation.

l HARRY e. MCCULLoci-i.

VitneSSeS:

F. G. SI-IAIBLE, J. F. DrrTMAYN.

Copies of this patent may be obtainedfor five cents each, by addressingthe Commissioner of Patents,

i Vlashngton, D. C.

